/*
 * Copyright 2007 National Bioinformatics Network
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package queryexecute;

import dgbgui.modeldocument.QueryResult;


public abstract class QueryExecutor extends SwingWorker {
    
    // Using the Swing Worker is described here:
    // http://java.sun.com/products/jfc/tsc/articles/threads/threads2.html
    
    public QueryExecutor(String queryString) {
        m_queryString = queryString;
    }
    
    public String getQueryString() {
        return m_queryString;
    }
    
    public boolean hasResult() {
        return (get() != null);
    }
    
    public QueryResult getResult() {
        // The result can only be obtained when the thread has finished
        return (QueryResult)this.get();
    }
    
    public void finished() {
        // Notify the distributor that a result has been received
        QueryDistributor.getInstance().resultObtained(this);
    }
    
    
    private String m_queryString;


}
